Lo spettro invisibile

Lugosi Béla

Dr. Charles Kessler

Polly Ann Young

Virginia Kessler

John McGuire

Ralph Dickson / Paul Dickson

Clarence Muse

Evans the Butler

George Pembroke

Lt. Williams

Betty Compson

Mrs. Kessler

Ernie Adams

Jules Mason, caretaker

Ottola Nesmith

Mrs. Mason

Terry Walker

Cecile Mannix, maid

Fred Kelsey

Detective Ryan

Jack Mulhall

Jim, a detective

Fred Aldrich

Guard at Ralph's Execution (uncredited)

Lloyd Ingraham

Psychiatrist (uncredited)

Robert Strange

Kirby--Coroner (uncredited)

Dorothy Vernon

Kessler's Cook (uncredited)

Robert F. Hill

Trial Judge (uncredited)